Energy is produced in the sun through a process. nuclear chemical mechanical frictional

What are chlorofluorocarbons and what impact do they have on the atmosphere?

Phase changes are chemical changes. true or false

On a day when the barometer reads 75.23 cm, a reaction vessel holds 250 ml of ideal gas at 20 celsius. an oil manometer ( ρ= 810 kg/m^3) reads the pressure in the vessel to be 41 cm of oil and below atmospheric pressure. what volume will the gas occupy under s.t.p.?